R7F0C802X 程序试用和心得

damiaa 2014-10-19 11:42 楼主

R7F0C802X 程序试用和心得先把上篇文章的例子重上一次：

r20an0257cc0100_mcu.zip (277.45 KB)
(下载次数: 5, 2014-10-19 11:44 上传)

r7f0c8021_sample_code.zip (44.91 KB)
(下载次数: 7, 2014-10-19 11:44 上传)

程序主要是由几部分构成，可以参照上篇文章里的r01uh0400cj0200_r7f0c801_5.pdf硬件手册对照看： Startup.s 启动文件（C编程一般都要） main.c 主程序，带中断子程序等都在这里 optionbyte.asm 配置文件 common.h 通用定义等。配置字设置 Set Option Bytes 00c0~00c3四字节 00C0与看门狗有关： 4：WDTON 3：WDCS2 2： WDCS1 1：WDCS0 这四位看门狗定时器的间隔中断时间 0：WDSTBYON看门狗定时器的计数器运行控制 00C1： 4： PORTSELB 复位脚选择 3： SPORS1 2：SPORS0 1 SPOR检测电压的设定（中断&复位模式） 00C2： 2：FRQSEL2 1：FRQSEL1 0：FRQSEL0选择高速内部振荡器时钟的频率 000C3 ：7：OCDENSET 0禁止，1允许片上调试运行的控制具体见r01uh0400cj0200_r7f0c801_5.pd第十八章 main.c: IO 初始化：直接对寄存器操作：可以参考r01uh0400cj0200_r7f0c801_5.pdf硬件手册第四章 void main(void) { unsigned char mode; cnt[0] = 0; cnt[1] = 0; cnt[2] = 0; breath = 0; breath_dir = 0; /* I/O Port Init */ IO_Init(); /* TAU0 Timer Init */ TAU0_PWM_Init(); /* Enable Interrupt */ EI(); /* Start Timer, i.e. PWM output */ TAU0_Start(); mode = 1; /* Program Loop */ while(1) { if (P13.7 == 0)　//如果按键按下就停止闪动 { if (mode) { mode = 0; TAU0_Stop(); } } else //否则就启动定时器也就LED闪动 { if (mode == 0) { mode = 1; TAU0_Start(); } } } /* while(1) */ } //这里涉及到了所有端口寄存器，如果ＩＯ做其他用途可以适当修改 void IO_Init(void) { /* Port Mode '0'=Out, '1'=In */ PM0 = 0x01; PM4 = 0x00; /* Port Register */ P0 = 0x00; P4 = 0x00; /* Pull-up resistor */ PU0 = 0x00; PU4 = 0x00; PU12 = 0x00; /* Port output mode '1'=open-drain */ POM0 = 0x03; /* Port mode control '0'=I/O, '1'=AIN*/ PMC0 = 0xE1; /* Peripheral I/O redirection */ PIOR = 0x00; } 各16 位定时器称为 “ 通道 ”，既能分别用作独立的定时器，也能组合多个通道用作高级的定时器功能。有四个主要参考r01uh0400cj0200_r7f0c801_5.pdf硬件手册第六，七章定时器开启 /* **--------------------------------------------------------------------- ** Abstract: This function start the timer. ** Parameters: None ** Returns: None **--------------------------------------------------------------------- */ void TAU0_Start(void) { TMIF00 = 0U; /* clear INTTM00 interrupt flag */ TMMK00 = 0U; /* enable INTTM00 interrupt */ TMIF01 = 0U; /* clear INTTM01 interrupt flag */ TMMK01 = 0U; /* enable INTTM01 interrupt */ TOE0 |= 0x03U; /* enable CH1 output */ TS0 = 0x03U; /* Trigger CH0 start */ } 定时器停止 /* **--------------------------------------------------------------------- ** Abstract: This function stop the timer. ** Parameters: None ** Returns: None **--------------------------------------------------------------------- */ void TAU0_Stop(void) { TT0 |= 0x03; /* Trigger CH0, CH1 to stop */ TOE0 &= ~0x02; /* disable CH1 output */ TMMK00 = 1U; /* disable INTTM00 interrupt */ TMIF00 = 0U; /* clear INTTM00 interrupt flag */ TMMK01 = 1U; /* disable INTTM01 interrupt */ TMIF01 = 0U; /* clear INTTM01 interrupt flag */ } PWM初始化 /* **--------------------------------------------------------------------- ** Abstract : This function implements timer initialization for PWM output. ** Parameters : None ** Returns : None ** Remark : Set PWM frequency = 1KHz, **--------------------------------------------------------------------- */ void TAU0_PWM_Init(void) { TAU0EN = 1; /* supplies input clock */ TPS0 = 0x0F; /* CK01=fclk, CK00=fclk/2^15 */ /* Stop all channels */ TT0 = 0x00U; /* Mask channel 0 interrupt */ TMMK00 = 1U; /* disable INTTM00 interrupt */ TMIF00 = 0U; /* clear INTTM00 interrupt flag */ /* Mask channel 1 interrupt */ TMMK01 = 1U; /* disable INTTM01 interrupt */ TMIF01 = 0U; /* clear INTTM01 interrupt flag */ /* Mask channel 1 higher 8 bits interrupt */ TMMK01H = 1U; /* disable INTTM01H interrupt */ TMIF01H = 0U; /* clear INTTM01H interrupt flag */ /* Set INTTM00 low priority */ TMPR100 = 1U; TMPR000 = 1U; /* Channel 0 is used as master channel for PWM output function */ TMR00H = 0x80U; /* CK01 */ TMR00L = 0x01U; #if 0 TDR00H = 0x13U; /* TDR00 = 4999+1 (0x1387H+1), 1KHz */ TDR00L = 0x87U; #else TDR00H = 0x1FU; /* TDR00 = 8191+1 (0x1fffH+1), ~610Hz */ TDR00L = 0xFFU; #endif TOL0 &= ~0x01; TO0 &= ~0x01; TOE0 |= ~0x01; /* Channel 1 is used as slave channel for PWM output function */ TMR01H = 0x84U; /* CK01 */ TMR01L = 0x09U; #if 0 TDR01H = 0x03U; /* TDR01 set duty ratio of TDR00 */ TDR01L = 0xE7U; /* TDR01 = 999+1 (0x03E7+1), 20% Duty ratio */ #else TDR01H = 0x00U; TDR01L = 0x00U; #endif TOM0 = 0x02U; TO0 &= ~0x02; TO0 |= 0x02U; TOE0 |= 0x02U; TOL0 = 0x02U; /* Set TO00, TO01 pin */ P0 &= 0xE7U; PM0 &= 0xE7U; } 中断响应参考r01uh0400cj0200_r7f0c801_5.pdf硬件手册第13章定时中断响应00程序 /* **--------------------------------------------------------------------- ** Abstract: This function implements timer interrupt. ** Parameters: None ** Returns: None **--------------------------------------------------------------------- */ __interrupt void interrupt_inttm00(){ cnt[0]++; if (breath_dir == 0) { /* dimm on */ if (breath <= 0x1fff) { breath += 0x10; } else { breath = 0x2000; breath_dir = 1; } } else { /* dimm off */ if (breath > 0) { breath -= 0x100; } else { breath = 0; breath_dir = 0; } } TDR01H = (unsigned char)(breath>>8); TDR01L = (unsigned char)(breath&0x00ff); } 定时中断响应01程序 /* **--------------------------------------------------------------------- ** Abstract: This function implements timer interrupt. ** Parameters: None ** Returns: None **--------------------------------------------------------------------- */ __interrupt void interrupt_inttm01(){ cnt[1]++; } 定时中断响应01h程序? /* **--------------------------------------------------------------------- ** Abstract: This function implements timer interrupt. ** Parameters: None ** Returns: None **--------------------------------------------------------------------- */ __interrupt void interrupt_inttm01h(){ cnt[2]++; } 本帖最后由 damiaa 于 2014-10-19 17:22 编辑